By lubrication, the movement of the plug and the space between the plug and the body get sealed.  Lubricant is poured into a fitting at the top of the stem, which flows down the passage, through the plug top to the grooves on the plug, and down to a well that is below the plug. This pressurised lubricant passage is fitted with a check valve to keep the lubricant under pressure & to prevent backflow when more pressure is exerted at the time of operation.

Lubricated Plug valve consists of all the parts that are present in a conventional plug valve.

• Body: The body is cast in place and carefully machined for optimal flow. The plug, which serves as a sealing part, is housed in the body. The body must contain provisions for connecting to the pipeline, fluid holding strength requirements, plug seating region, lubrication mechanism, and stem seal.
• Plug: For leak resistance, the plug is carefully machined with a grinding finish to be matched with the body seat. Grooves are included to aid in lubricant and sealant. According to the need, several flow passages can be made available.
• Cover: The cover is attached to the bottom of the body by studs and nuts. This cover is made to withstand a lot of pressure while still complementing the body’s surface.
• Stem: The stem has a burnished surface for lower torque and adequate strength for smooth plug movement.
• Gear Box: For smooth functioning, a quarter-turn gearbox of robust design is used. Wrench, Gear, and other operators are available.
• Injector: Injectors are placed on the body to infuse lubricant into the body and to seal the stem in the event of an emergency.
• Lubricant: The lubricant works as a structural component of the valve, as it offers a flexible and renewable seat. To achieve a seal, this removes the need for force fits and metal-to-metal distortable-seat connections. To avoid the damaging effect of the line fluid and to produce an impermeable seal around each body port, even under pressure, the lubricant must display adequate elasticity as well as protection against the solvents and chemicals. The lubrication coating also prevents corrosion on the metal surfaces between the plug and the body. The lubricant seal created by the lubricant flowing through a series of lubrication grooves that round each port helps to keep the necessary layer on the metal closure surfaces.

• Size Range                  : NPS 1/2 to NPS 56
• Class Range                : 150LB to 2500LB
• Design Standard       : API6D / API599
• Fire Standard              : API 6FA
• End Connection         : RF / Threaded / BW
• Operation                     : Manual Lever / Pneumatic / Electrical
• Pressure Rating          : ANSI Class 150 to Class 2500
• Temperature Range  : -29°C to +180°C
• Pressure Testing         : API 598 / API 6D / EN 12266-1/ISO 5208

Lubricated Plug valve has a strong structure and are easy for in-line maintenance. Lubricated Plug valve is employed in situations where there are pulsing or static high pressures. Lubricated Plug valve can withstand pressures of over 2500 pounds per square inch. Lubricated Plug valve is ideal for media utilised in a variety of sectors, including petroleum, chemical, pharmaceutical, chemical fertiliser, and electric power. Lubricated plug valve are is prone to seizing or wear, and in some operating situations, they may have a slight increase in corrosion resistance